<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>多媒体</title>
  </head>
  <body>
    <!-- #region main -->
    <img src="http://www.example.com/demo.jpg" />
    <!-- #endregion main -->

    <!-- #region video -->
    <video src="http://www.example.com/demo.mp4"></video>
    <!-- #endregion video -->
  </body>
</html>
